The Ice Water Caloric Irrigation (IWCI) in anaesthetised and non-anaesthetised External Auditory Canal (EAC): A preliminary study

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Abstract

Objective: This study aims to establish ice water caloric irrigation (IWCI) norms in healthy adults and to investigate possible underlying mechanism of IWCI, by eliciting the effect of anaesthetised and non-anaesthetised external auditory canal (EAC) in healthy adults. Design: Preliminary experimental study. Materials and Methods: Thirty four right and 36 left EAC were randomly anaesthetised with the EMLA cream and was manually irrigated with ice water (4°C, 5 ml). The evoked eye movements were recorded using video-based system (Micromedical VisualEyesTM VNG, Chatham, IL, USA). Results: The anaesthetised ears showed slightly later mean onset of nystagmus, as compared with the non-anaesthetised ears (27.23 ± 7.94 s and 25.76 ± 5.45 s respectively). Similar pattern was also recorded with the mean period of nystagmus (121.97 ± 34.41 s and 118.51 ± 24.79 s respectively for the anaesthetised and non-anaesthetised ears), with no significant differences in both mean onset and period of nystagmus between the ears (p > 0.05). There were also no significant differences in the onset and period of nystagmus in between the genders (p > 0.05). Conclusion: The possible underlying mechanism for IWCI responses was better understood from this study. The norms obtained from healthy adults could be used by practicing health professionals in the region.

Original languageEnglish
Pages (from-to)278-280
Number of pages3
JournalInternational Medical Journal
Volume25
Issue number4
Publication statusPublished - 1 Aug 2018

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Ear Canal
Ice
Ear
Water
Eye Movements
Research Design
Health

Keywords

  • Anaesthetised
  • External auditory canal
  • Ice water caloric irrigation
  • Lateral semicircular canal stimulation
  • Nystagmus

ASJC Scopus subject areas

  • Medicine(all)

Cite this

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title = "The Ice Water Caloric Irrigation (IWCI) in anaesthetised and non-anaesthetised External Auditory Canal (EAC): A preliminary study",
abstract = "Objective: This study aims to establish ice water caloric irrigation (IWCI) norms in healthy adults and to investigate possible underlying mechanism of IWCI, by eliciting the effect of anaesthetised and non-anaesthetised external auditory canal (EAC) in healthy adults. Design: Preliminary experimental study. Materials and Methods: Thirty four right and 36 left EAC were randomly anaesthetised with the EMLA cream and was manually irrigated with ice water (4°C, 5 ml). The evoked eye movements were recorded using video-based system (Micromedical VisualEyesTM VNG, Chatham, IL, USA). Results: The anaesthetised ears showed slightly later mean onset of nystagmus, as compared with the non-anaesthetised ears (27.23 ± 7.94 s and 25.76 ± 5.45 s respectively). Similar pattern was also recorded with the mean period of nystagmus (121.97 ± 34.41 s and 118.51 ± 24.79 s respectively for the anaesthetised and non-anaesthetised ears), with no significant differences in both mean onset and period of nystagmus between the ears (p > 0.05). There were also no significant differences in the onset and period of nystagmus in between the genders (p > 0.05). Conclusion: The possible underlying mechanism for IWCI responses was better understood from this study. The norms obtained from healthy adults could be used by practicing health professionals in the region.",
keywords = "Anaesthetised, External auditory canal, Ice water caloric irrigation, Lateral semicircular canal stimulation, Nystagmus",
author = "{Abdul Wahat}, {Nor Haniza} and Asma Abdullah and Chong, {H. S.}",
year = "2018",
month = "8",
day = "1",
language = "English",
volume = "25",
pages = "278--280",
journal = "International Medical Journal",
issn = "1341-2051",
publisher = "Japan International Cultural Exchange Foundation",
number = "4",

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T1 - The Ice Water Caloric Irrigation (IWCI) in anaesthetised and non-anaesthetised External Auditory Canal (EAC)

T2 - A preliminary study

AU - Abdul Wahat, Nor Haniza

AU - Abdullah, Asma

AU - Chong, H. S.

PY - 2018/8/1

Y1 - 2018/8/1

N2 - Objective: This study aims to establish ice water caloric irrigation (IWCI) norms in healthy adults and to investigate possible underlying mechanism of IWCI, by eliciting the effect of anaesthetised and non-anaesthetised external auditory canal (EAC) in healthy adults. Design: Preliminary experimental study. Materials and Methods: Thirty four right and 36 left EAC were randomly anaesthetised with the EMLA cream and was manually irrigated with ice water (4°C, 5 ml). The evoked eye movements were recorded using video-based system (Micromedical VisualEyesTM VNG, Chatham, IL, USA). Results: The anaesthetised ears showed slightly later mean onset of nystagmus, as compared with the non-anaesthetised ears (27.23 ± 7.94 s and 25.76 ± 5.45 s respectively). Similar pattern was also recorded with the mean period of nystagmus (121.97 ± 34.41 s and 118.51 ± 24.79 s respectively for the anaesthetised and non-anaesthetised ears), with no significant differences in both mean onset and period of nystagmus between the ears (p > 0.05). There were also no significant differences in the onset and period of nystagmus in between the genders (p > 0.05). Conclusion: The possible underlying mechanism for IWCI responses was better understood from this study. The norms obtained from healthy adults could be used by practicing health professionals in the region.

AB - Objective: This study aims to establish ice water caloric irrigation (IWCI) norms in healthy adults and to investigate possible underlying mechanism of IWCI, by eliciting the effect of anaesthetised and non-anaesthetised external auditory canal (EAC) in healthy adults. Design: Preliminary experimental study. Materials and Methods: Thirty four right and 36 left EAC were randomly anaesthetised with the EMLA cream and was manually irrigated with ice water (4°C, 5 ml). The evoked eye movements were recorded using video-based system (Micromedical VisualEyesTM VNG, Chatham, IL, USA). Results: The anaesthetised ears showed slightly later mean onset of nystagmus, as compared with the non-anaesthetised ears (27.23 ± 7.94 s and 25.76 ± 5.45 s respectively). Similar pattern was also recorded with the mean period of nystagmus (121.97 ± 34.41 s and 118.51 ± 24.79 s respectively for the anaesthetised and non-anaesthetised ears), with no significant differences in both mean onset and period of nystagmus between the ears (p > 0.05). There were also no significant differences in the onset and period of nystagmus in between the genders (p > 0.05). Conclusion: The possible underlying mechanism for IWCI responses was better understood from this study. The norms obtained from healthy adults could be used by practicing health professionals in the region.

KW - Anaesthetised

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KW - Lateral semicircular canal stimulation

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